Bump version to 2.41

cd6c697e · Tiago Peixoto · ac2e8608 · cd6c697e
Commit cd6c697e authored Jun 28, 2021 by Tiago Peixoto
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.

 dnl graph-tool package version number
 m4_define(graph_tool_version_major, 2)
-m4_define(graph_tool_version_minor, 41dev)
+m4_define(graph_tool_version_minor, 41)

 AC_INIT([graph-tool],
        [graph_tool_version_major().graph_tool_version_minor()],